Allan Lorraine G
Department of Psychology, McMaster University, Hamilton ON, Canada.
Q J Exp Psychol B. 2002 Jan;55(1):43-60. doi: 10.1080/02724990143000162.
In a temporal bisection task with humans, the observer is required to decide whether a probe duration (t) is more similar to the short referent (S), an R(S) response, or to the long referent (L), an RL response. Temporal bisection yields a psychometric function relating the proportion of long responses, P(R(L)), to probe duration t. The value of t at which R(S) and R(L) occur with equal frequency, P(R(L)) = .5, is referred to as the bisection point, T1/2. Bisection models usually interpret T1/2 as identifying the value of t that is equally confusable with S and L, but they differ in their predictions for the location of T1/2. The present paper presents new data relevant to the location and interpretation of T1/2. The data indicate that the empirical values usually are biased, the biases being influenced by duration range, L:S ratio, and probe spacing. Moreover, the biases often are not consistent across observers. It is concluded that empirical values of T1/2 should not be interpreted as indicating the value of t that is equally confusable with S and L.
在一项针对人类的时间二等分任务中，观察者需要判断一个探测时长（t）更类似于短参考时长（S）（即做出R(S)反应），还是更类似于长参考时长（L）（即做出RL反应）。时间二等分产生一个心理测量函数，将长反应的比例P(R(L))与探测时长t联系起来。当R(S)和R(L)出现的频率相等，即P(R(L)) = 0.5时，t的值被称为二等分点T1/2。二等分模型通常将T1/2解释为确定与S和L同样容易混淆的t值，但它们对T1/2位置的预测有所不同。本文给出了与T1/2的位置和解释相关的新数据。数据表明，经验值通常存在偏差，这些偏差受时长范围、L:S比率和探测间隔的影响。此外，不同观察者之间偏差往往不一致。得出的结论是，T1/2的经验值不应被解释为表明与S和L同样容易混淆的t值
